Extended property patterns C# 10.0

Allow property sub-patterns to reference nested members.

Pattern matching ^{C# 7.0} is a very powerful feature however matching properties within objects was verbose.

This syntax simplifies the syntax by allowing dot notation to match the property directly.

Code

NowBefore

C#

return analysis switch
{
    { MatchedRule.Action: "ignore" } => Action.Ignore,
    _ => Action.Block,
};

C#

return analysis switch
{
    { MatchedRule: { Action: "ignore" } } => Action.Ignore,
    _ => Action.Block,
};

More information

Specification